Chinese Silkvine Root-Bark Classic Formulas

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Dispels wind-damp and unblocks painful obstruction - Xiang Jia Pi is used for chronic bi syndrome with cold, damp, weakness, and fixed pain affecting the low back, knees, ankles, and lower limbs.
Strengthens sinews and bones - in small, carefully controlled doses it is directed to weakness of the tendons and bones, difficulty walking, and chronic lower-body debility with cold-damp obstruction.
Promotes urination and reduces edema - traditional use extends to superficial swelling, lower-body edema, and fullness where damp accumulation coexists with cold and weakness.
Warms the channels but requires caution - unlike the gentler Acanthopanax form of Wu Jia Pi, Xiang Jia Pi is a much stronger and more toxic substitute, so its traditional role is narrower and more specialist.

Xiang Jia Pi with Du Zhong, Niu Xi, and Ba Ji Tian - warming, sinew-strengthening pairing logic for chronic low-back and knee pain with weakness and cold-damp obstruction.
Xiang Jia Pi with Fu Ling Pi, Da Fu Pi, and Sheng Jiang Pi - edema-focused pairing strategy when swelling and dampness accumulate in the lower body.
Xiang Jia Pi medicinal wine use - traditional external or internal wine preparations employ the bark in very small amounts for cold-damp bi and weakness of the legs.

TCM Wiki describes Xiang Jia Pi as acrid, bitter, and warm, entering the Liver, Kidney, and Heart channels, with actions of dispelling wind-damp, strengthening sinews and bones, and inducing diuresis for edema.
American Dragon likewise emphasizes its use for painful obstruction, weakness of the tendons and bones, and edema, but notes that its toxicity makes it less commonly used than safer wind-damp herbs.
Later clinical and trade notes repeatedly warn against confusing Xiang Jia Pi from Periploca with the gentler Acanthopanax form of Wu Jia Pi, because the therapeutic tone and safety profile are not the same.